Method of making reenforcing corner straps for export boxes and the like



Dec. 27, 1932. -c. L. SNYDER METHOD OF MAKING REENFORCING CORNER STRAPS FOR EXPORT BOXES AND THE LIKE Filed Jan. 23, 1930 Patented Dec. 27, 1932 mm s'ra'res PA ENT- oFr cE 011mm) Ii. SNYDER, or niirisorr, MICHIGAN, AssIGNoR TO .THE vans AUTO i LOADING co; INC.,,OF DETROIT, .iaronxeaa rv Marion or MAKING imnivroncrne C n ara roe 'nxrolttl j Q 'FS I AND THE. LIKE I Application filed. January 23,19 30'. ;Seria1 No. 422,826.

This invention relates to certain new and useful improvements in reenforcing corner straps for export boxes and the like.

H The primary object of this invention is to provide a reenforcement for the corners of shipping boxes and the like in the form of a metallic strap of triangular form to be mounted upon and have the sides thereof traverse three sides of the box and to be struck or drawn from a single blank of material for bracing the box corner against movement in all directions and especially to restrain from movement, the strips, boards or stringers comprising the box wall.

A further object of the invention is to provide a reenforcing corner strap for export boxes and the like wherein the corner strap is drawn from a triangular blank having outwardly curved sides and curved '20 fillets at the inner angles of the blank so that when drawn by a punch or the like to present the side strips or sections of the strap for flat contact with the box side, the opposite edges of the initially curved sections of the strap are moved into parallelism while the corner bends are maintained against disruption by the curved fillets, the corner strap being contiguous throughout the length thereof, formed of a single piece of material and free of folds, bends or connections in any pllt and especially in the side sections there- 0 With the above and other objects in view that will become apparent as the nature of the '35 invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawing and claimed.

In the drawing 2-- Figure 1 is a fragmentary perspective view of an export box or the like with the reenforcing corner straps engaged with the corner of the box;

Figure 2 is a fragmentary side elevational view;

Figure 3 is a detail sectional view taken on line 3-3 of Figure 1;

Figure 4 is a plan view of the blank from 50 which the corner strap is drawn showing the initially. curvedinner and outer sides ofthe sid'efsections of the corner-strap and the curved fillets at the inner angles ofuthe corner'bends; w

H Y 1 igure 5 showsside elevational views of apunch, strap 'blank and'drawn strap; and -"Figure 6 isan outer-side view of the corner strap. i J 1 "The device 'disclosed inthis application is for the reenforceme'nt of corners of: export boxes and the like-and is in the form of atriangular strap to be engaged withthree sides of a boxatthe corner to be anchored to the box strips and-stringers for holding them against movement relative to each other and to maintain the boxnintrue shape and form. Numerous attempts have heretofore been made to reenforc'e the corners'of boxes by strap irons and' the like,r=suchs-attempts including corner'straps formed of several sections as well assinglef sections embodying overlapped folded parts as well 'as=connected ends, but in all such instances, these straps have utterly failed in performing their functions'as the connections between the strap sections become loosened permitting expansion and failing as a reenforcement. In the present application, the corner strap is drawn from a triangular blank formed of a'single piece of material and when pressed or drawn into the propershape is free of any folds or joints so that expansion of any part thereof is impossible and when anchored to the corner of a box or the'like, the strips, boards and. stringers comprising the box are maintained against relative movement to resist strains in any direction. 7 v

The reenforcing corner strap is formed from a triangular blank, preferably by a drawing operation, the blank as shown in Figure 4 comprising three side sections 10 having their inner and outer edges curved outwardly as at 1 1 and 12 respectively with a curved fillet 13 at each angle corner of the blank. A nail receiving opening 14 is provided in each side section 10 adjacent each end to facilitate anchoring of the strap to the corner of the box in a manner later to be described. Y

,With'the use of the triangular punch '15 shown in Fig. 5', the strap blank which normally has its side sections 10 lying in a single plane as at 10a, the side sections 10 are moved into the form shown in Figs. 5 and 6 by a drawing operation during which the inner and outer curved edges 11 itnd12iespective ly of the side sections 10 are moved into straight lines as shown at 11a and 12a while the" curved *fillets 13 tea-ring of the blank or other disruption' 'at the angle-corner,

it beingnoted fromanins p ection of Figurefi, that the lower corners'w'aof the-punch 15am,

slightly rounded to prevent disruption. The side sections 10 are moged at right angles to each other in the formation of the triangular cornerbracing strap for :flatcontact-with :side faces iofian export box or; the dike comprising side boards lfi-and-internal stringers. The corner strap is anchored in position by nails 17 2or-the like driven-through the openings 14 i'nthe side sections 10 tozen't'er the boards 16 and stringers'of the box as shown in Fig. 3. With this form of corner strap, the r gboxstringers :16 are restrained against imovemeht in all directions =and by: the single-: piece'com StIllOtlOIliOfthe .corhe'r r'strap; being continuous and free of foldsybendsa or: joints,expansion of theistrap 'is impossiblerrlesulting' in a rigid anchor for the box stringers at the. cor ners ofthe box. .With: the particular design of blank "employed in the dr'awing operation resulting in the: corner. straps, the latter embodies increased strength 'from the initially curved inne'rzand outer'side's. 11- and 12 respectively'of the side-sections 10, while any tendency-of disruption at thepoint il3-oftheangles is eliminated by the presencei-ofcurvature therein. M

- From the above detailed description of the invention, it is believed that themethod of construction and use of the-same will at once be apparent and while there is herein shown and described the preferred embodiment of the invention,.it is'nevertheless-to be understood that minor changeslmay be made therein without departing from the spiritand scope of the invention as claimed. i

I claim 1. The method of forming a reenforcing corner strip for boxes and the like consist-- ing of cutting a blankof triangular formation wherein the sides of the triangle consist of parallel curved strips, then drawing this shape from a single plane into the form of a triangular pyramid whose sides are at right angles to each other, and at the same time straightening the curved parallel sides of the triangle to a straightparallelism.

2. The method of forming a reenforcing corner strap for shipping boxes containing internal stringers, wherein the corner strap is anchored to the outer boards and internal stringers and wherein the strap is formed-of a blank of substantially triangular form havmg its slde sections outwardly arched .de-

fining inner and outer concentric curved edges, said method consisting of cutting a blank of triangular formation with sides comprising curved strips, then drawing this shape from ahsingle. lane into bracing form with thefaces of t e 'sidesections f in planes at right angles to each other and simultaneously straightening the curved side sections to a straight Parallelism; l

' Intestimony' whereof I afiix my signature.

CL ORD L-fi YD 

